My proposal is to develop option so you can drag and drop from left side to right side of the task and drop it into sub-task to create - TASK to sub - TASK
Asana already works this way! Select a task to have it appear in the right Task Detail pane, then drag another task on the let main pane into the lower part (subtasks area) of the selected task.
Thanks and bravo !
Thank you very much, perfect !
There is also the option in the “…” menu of a task to as a subtask of another task.